Transmission mechanism.



V. A. BOXER.

TRANSMISSION MEGHANISM.

APPLICATIOE FILED FEB.5,1914.

lateef. Sept. 22, EM.

4 SHEETS-SHEET l,

wml WK V. A. BUKER.

TRANSMISSIOME APPLICAToN umn mlm, 1914.

Patented Sept. 22,1914.

4 SEEBTSf-SHEET 3.

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www@ n E o s@ Tf. L BOXER. TRNSMSSION MEGHANISM.

APPLIUATION PILBD'FEB, 191%,

?atentaf Sept. 22, 19M.

4 SHEETS-SEEET i..

proper, and the face of this wheel is arranged for frictional engagementwith the periphery of a peripheral friction wheel 30 that is keyed forrotation with, 1out for sliding movements on, a transverse shaft 31 thatis journaled in suitable bearings on the casing 13. The hub of thefriction Wheel 30 is formed with a plurality of endlesscircumferentially extended rack teeth 32 that mesh with a pinion 33secured on the intermediate portion of an uprightshaft 34 (see Figs. 1,2 and 4), which shaft is journaled in suitable bearings on the top andbottom of the casing 13. The shaft 34 carries an upper spur pinion 35which, as shown, is of the same size as the spur pinion 33, so that inFig. 1 it appears to mesh with the endless rack 32, but is located farabove the same, and is in mesh with the rack teeth 36 of a tubularrectangular rack bar or casing 37, which latter is mounted to slideforwardlyI ard rearwardly on a fixed horizontal guide bar 38 secured, atits ends, to the upper portion of the casing 13. A coiled spring 39,attached,to the rack har 37 and to the guide bar 38, yieldingly drawsthe said rack bar forward. Y

The numeral indicates a' so-called primary speed regulating slide,the'purpose of which will presently appear, and which slide is mountedfor sliding movements in the fixed bar 38, and is provided, at its rearend, with a laterally projecting swiveled bearing 40a.

The chief element 'of the common controllerl for the transmission andsteering mechanism is preferably in the form of an upright rod 41, theupper portion of which is supported by and journaledin the swiveledbearing 40a, and the lower end of which is journaled, with freedom forforward and rearward movements in a vertical plane, in

vertically spaced bearinglugs 42 (see Figs. 3 and 6), of a sleeve 43that is swiveled on the left hand end of shaft bearing 20. Be-

tween the lugs 42, the said controller rod 41 is provided with a spurgear 44 that is in constant mesh with the endless rack teeth 26 of theclutch-actuated shaft 19.

it will be remembered that the shaft 12 is capable of slight endwisemovement. This is to permit the facefriction wheel 14 to be moved intoand out of frictional engagement with the peripheral friction wheel 30.For yieldingly pressing the said wheel 14 against thew wheel 30, acoiled spring 45 (see Fig. 4) is placed around the shaft 12 andcompressed between the casing 13 and a flange 46 on the said shaft. Thesaid flange 46 is engaged by the depending arms of a bell crank 47 thatis pivoted on a transverse supporting rod 48 secured, at its ends, tothe sides of the casingr 13. The upper arm ofthe said bell crank ispreferably equipped with a roller 49 that is adapted to be engaged by acam-acting rib 50 of the primary slide 40, heretofore noted. A stud 51projects from the slide 40 and works in a slot 52 of the tubularsecondary slide 37, so that the said slide 40 has a limited slidingmovement in respect to the said slide 37. A coiled spring 53 attached tothe casin 13 and to the stud 51, puts the slide 40 under a strain tomove' forward.

The fixed bar38'(seeFigs. 4, 5 and 8) is provided with rack teeth thatare preferably divided into several longitudinally spaced groups 54, 55and 56. The tubular slide 37 -is provided with a pivoted dog 57 that isnormally gravity-held in engagement with certain of the rack teeth 54,55 or 56, and is provided with an Oblique nose 58 adapted to be engagedby a tripping block or abutment 59 that has frictional engagement withlone inner wall of the tubular slide 37 and with the adjacent face ofthe fixed rack bar 38, but is given ,the greater frictional engagementwith the latter by means of a leather or similar facing 60 secured tosaid block. The said block, however, is provided with a projecting stud61 that works in a short longitudinal slot 62 in the adjacent wall ofthe tubular slide 37. The transmission mechanism has'now been described.The worm 27, clutches 21 and 25, shaft 19 and pinion 44 constituteelements of the steering mechanism proper, which steering mechanism, asillustrated, also includes the following meshes with a 'worm gear 63,which is se cured on the rear end of a countershaft 64 journaled insuitable bearings on the casing 1 and provided, at its front end,` witha skew gear 65 (see Figs.` 1 and 4). This skew gear 65 meshes with asimilar skew gear 66 secured on a short transverse crank shaft 67journaled in suitable bearings on the casing 13 and provided with anupwardly extended crank arm 68. This crank arm 68 is connected by a link69 to an arm 70, which projects inwardly from one of the front stubaxles 5. The steering connections have now been described.

As further elements of the common con-` troller for the transmissionland steering mechanism, the controller rod 41 is pro-A vided, at itsupper end, with a cross arm 74 that is rigidly secured thereto at itsintermediate portion. The controlling reins or lines'75 are secured, attheir front ends, to the opposite ends of the said head 74. These reinsmay extend rearward to any suitable point, such, for instance, as to aplatform of a gang plow, or to the working platform or within reach ofthe seatof a harvester, and, if desired, any suitable means may beprovided for anchoring. the rear ends of the said reins. Usually,however, these reins will be held in the hands of the operator.

The tractor illustrated is of the type devices.V The .said ,'Worm 27best shown in Fig. 8, the tripping block 59 will stand in the positionshown inthe said view. The do 57 is released from the ratchet teeth othe bar 38 by engagement of its nose 58 with the trippin block 59, at a.time when the secondary sli e 37 is given forward movement, and whilethe said block is frictionally held to the fixed bar 38. Butin theposition of the parts shown in Fig. 8, the said slide 37 cannot be givensuicient vforward movement to accomplish this result, because of theclose engagement between the said dog 57 and the teeth of the said bar38.

To accomplish this release of the dog 57, the

slide 37 must be drawn forward to a position in which the dog 57 willengage the long clearance passage between the teeth and 56. Then the dogis brought to this position and the slide 37 is moved rearward, the nose58 of the said dog will be cammed upward by the block 59, and the dogreleased while the said dog is frictionally held or stuck tothe fixedbar 38, and while its stud 61 is moving rearward in the slot 62 of thesaid secondary bar 37. After the dog has been released, the stud 6l andslot 62 will cause the tripping block 59 to move rearward with the saidsecondary slide 37. The

release of the dog 57 may be also accomplished from a position in whichit is engaged in the long notchbetween the teeth 54 and spring 39,forward to a position for maximum forward speed, or may be stopped in anintermediate point and interlocked with any one of the teeth 54 or 55,simply by giving the said\slide 37 the proper rearward movement, whileits dog 57 is released the block 59, and then a slight forward movementaway from the tripping block nder this forward adjustment, the

secondary slide 37 may be locked where' desired, but the friction wheel14 will not be reiingaged hy the friction wheel 30 until the primaryslide 40 has reached, or approximately reached, the limit of its forwardmovement.

From theforegoing. it is thought to be clear how the common controlleris operated, under movement in one direction, to

control the steering mechanism, and under another movement, to controlor adjust the variable speed transimssion mechanism.

These two adjustments may be accomplished independently or at differenttimes, or may bey accomplished simultaneously, by imparting to thecontroller rod-41 an oscillatory movement' on its own axis while it isbeing given a forward or rearward movement.

1. The combination with cooperating members, of means for adjusting oneof said' members' in respect to the other, compris'- ing a slide havingconnections to the adjustable member, a lock for securing said slide indifferent positions, and a frictionally anchored trip for Said lockhaving af limited movement slide.

2.' The combination with cooperating members, of means movingone of saidmembers in respect to the other,'comprisig a relatively ixed guide, aslide movable on said guide and' having connections to the movablemember, a pawl and ratchet connection between said slide and guide forlocking only in respect to said said slide in dierent positions, and apawl trip frictionally anchored to said guide and having a limitedmovement only in respect to said slide.

3. The combination with coperating friction wheels, of means foradjusting one of said friction wheels in respect to the other,

com risin a fixed cuide havin# ratchet b C teeth, a slide mounted onsaid guide and having a pawl engageable with the ratchet teeth thereof,to lock said wslide in different positions, said slide havingconnections to the movable friction wheel, and a pawl trip frictionallyanchored to said guide and having a limited movement only in respect tothe said slide.

4. The combinationwith coperating friction wheels, 'of means foradjusting 'one of said friction wheels in respect to the other,comprising a fixed guide having ratchet teeth, a slide mounted on saidguide and having a pawl engageable with the ratchet teeth thereof, tolock said slide in different positions, said slide having connections tothe movable friction wheel, and a pawl trip frictionally anchored tosaid guide and having a limited movement only in respect to the saidslide, the ratchet lteeth on said guide being grouped -with clearancespaces between the groups permitting sufficient movement of said slideto cause the pawl thereof to be released by the said fric-tionallyanchored pawl trip.

The combination with cooperating friction wheels, of means for adjustingone of said friction wheels in respect to the other, coinprising affixedguide having ratchet teeth, a slide mounted on said guide and having apawl engageable with the ratchet teeth thereof, to lock said slide indifferent positions, said slide having connections to the movablefriction wheel, a pawl trip fric- ,more said slide ,in onedirection, anda con-v tionally anchored to said guide and having a limited movement`only in respect to the said slide, the ratchet teeth on said guidebeing grouped with clearance spaces between the groups permittingsuicient movement of said siide to cause the pawl thereof to be releasedby the said rictionally anchored paWl trip, a spring tending to nectionfor moving said slide in the opposite direction.

6. The. combination with coperating friction wheels, of means for movingone of said friction Wheels7 one in respect to the other, comprising arelatively fixed guide having ratchet teeth, primary and secondaryslides movable on said guide and having a limited movement, the one inrespect to the i other, yielding means tending to move said slides in acommon direction, a connection to said primary slide for moving the Sameagainst the tension of said yielding means, a connection betiveen saidsecondary slide and the adjustable friction Wheel, a pivoted pawl onsaid secondary slide engageable with the ratchet teeth of said guide,and a .pawi trip frictionally anchored to said guide and having a imitedmovement oniy'in respect to said secondary slide.

In testimony whereof I. afx my signature in presence of two Witnesses.

vITUs A. nonna.

Witnesses:

EMILY MAY KING, F. D. MERCHANT.

